Sinker or web-holder cam mechanism for knitting machines



Jun@ 5', 11923. EALSSOB G. P. BOSWORTH SINKER OR WEB HOLDER CAM IVIECHANISM FOR KNITTING MACHINES Original Filed OOC. l, 1920 Patented dunne 5, M23..

lldllld EETTEE sTETEs EETENT oEETcEo GEORGE BOSWORTH, F CENTRAL FALLS, RHODE ISLAND, ASSIGNOR TO HEMJPHILL COMPANY, OF CENTRAL FALLS, RHODE ISLAND, A CORPORATION OF MASSACHU- sn'rrs.

SINKER 0R WEB-HOLDER CAM MECHANISM FOR KNITTING MACHINES.

Original application-filed ctober l,

To all whom 15mg concern:

Be it known that ll, GEORGE P. Boswon'rn, a citizen of the United States, and a resident of Central Falls, in the county of Providence and State of Rhode llsland, have invented an lm rovement in Sinker or Web- Holder Cam echanism for Knitting Machines, of which the following description, in connection with the accompanying drawings, is a specification, like characters on the drawing representing -like parts.

This application is a division of my copending application lSerial No. 414,085, filed October 1, 1920.

rlhis invention relates to knitting machines and particularly to instruments for operating web holders, sinkers or like instrumentalities. 'lhe invention will be best understood by reference to the following description when taken in connection with the accompanying drawing, wherein- Fig. 1 is a plan view of a so-called sinker ring upon which the various cams for operating the sinkers or web holders are supported;

Fig. 2 is -a ve-rtical section upon the line 2-2 of Fig. 1; and

Fig. 3 is a side elevation of the inner member of the cap ring of Fig. 1.

rllhe present invention is applicable to various types of machines, but the present embodiment thereof involves 'a circular knitting machine having the principal character` istics of the so-called Banner machine disclosed in the Hemphill Patent No. 933,443, patented September 7, 1909.

Furthermore the invention is capable of use with bothfsprin" beard and latch needle machines. lln the type of hitting machine disclosed the needle carrier is of cylindri cal form and contains a circularseries of independently movable needles, the needle cylinder and cap ring having relatively rotary movement so as to ed'ect the operation of the reciprocating elements, herein web holders or sinkers. l: have not illustrated the needle cylinder, but it is provided with a "series of needles adapted to be reciprocated therein in the usual manner.` Attached to said' cylinder is a sinker or web holder bed ring, and having usual grooves radially positioned with relation to the centerv of the needle cylinder to receive the web holders or holders ma 1.920,v Serial No. 414,085. Divided and this application led March 30, 1922. Serial No. 548,160.

sinkers. rlhe needles, which may be latch needles or spring beard needles, are raised or lowered in the usual loop forming manner by appropriate knitting cams, not herein shown. ln some machines the reciprocating elements above referred to are employed to sink the yarn between the stems of the needles when in their elevated positions, while in other machines similar elements may be used for holdingv the web during the raising of the needles to prevent such web from being elevated therewith, particularly when no tension is applied to the knitted fabric. When such elements are used, means are required to impart lthe'nec`= essary reciprocating movements thereto in order to effect the cooperation ofsaid ele ments with the needles, and whether sinkers or web holders are employed, similar reciprocating means are necessary. ln the presentembodiment ofthe invention, the reciprocating elements are in the form ofiweb holders, to which, however, the invention isy in no wise restricted, and the term web holder is used in a general sense. Said web be of any suitable design for engaging t e work and holding the same during the raising of the needles in order to prevent said work from being carried up\ wardly thereby. 'Such web holders as is customary are provided with operating butts projecting upwardly from the upper edge of` the web holders.

lln order to reci rocate said elements l) the present embodi- (herein web holders ment of the invention involves the use of a cap ring comprising an outer member 1 and an inner member 2, the latter being arranged concentric with the outer member and engaging said outer member along an annular fline, both of said members being in the form of rings` as is clearly evident from Figs.4 1 and 2. rlhe said inner and outer members are so formed upon their under surfaces as to provide an lannular groove indicated in part atv3 in Fig. 2, wherein the butts of the web holders are received, so that said butts may engage' and lbe controlled bv the opposed faces of said members land 2.

The under faces of the said annular members lie substantially in the same plane,as indicated in Fig. 2, and are adapted to engage the upper edges of the web holders and rest upon the corresponding upper face of the web holder bed ring shown at 3, thus providing suitable supporting and guiding means for said ring. The outer margin -lustration or description thereof is necesurin the reciprocating movements of the knitting machine,'it is desirable to edect a relative movement between the cap ring and the reciprocating elements (herein we holders), and in the present embodiment of the invention means are provided consisting y of the two armed brackets 5 attached to the said cap ring by screws 6 6. The arms 7--7 of said bracket extend in substantially radial directions from the ring and support adjacent their outer ends adjustable stop screws The screws 8 are arranged so as automatically to engage a standard 9 carried by said same part of the knitting machine frame, and herein the standard constitutes the support for the latch ring or v yarn guide supporting member and is carried b y a part which does not move with the needle cylinder, thereby creating a relative movement between said cap ring and said needle cylinder. The positions of the screws 8, 8 may be such as to permit a slight shogging movement of the ring to take place. urmg the reciprocations of the needle cylinder, but, as indicated, such movement may be very small and practically negli- 'ble.

When relative reciprocating movements are desired between the needle cylinder and the cap ring, as in the formation of fiat webs or heel and toe pockets, two sets of cams are usually employed for operating the web holders at the proper `intervals to cooperate with the needle in the loop forming operations. Hencein the disclosed embodiment of the invention two such sets of cams are provided, each set including a web holder advancing cam, and a web holder retracting cam being in the disclosed embodiment of the invention formed as a single piece and having parts or formations cooperating with each advancing cam.

. During the operation of the machine, the inner and outer ring members 1, 2 are'caused to cooperate in theirv action by appropriate stops consisting of brackets 10, 10 secured to one of the ring members and herein the outer ring member 1 and bearingv adjusting screws 11, 11 arranged in opposed relation to engage opposite portions of an abutment 12 secured to one ring member, herein thel inner member 2. Obviously the brackets 10 may be positioned at predetermined distances apart, so as to cause the screws 11 to engage said abutment 12 when desired.

lln the disclosed embodiment of the invention, both sets of cams, including the advancing and retracting cams, are mounted upon the inner ring member 2. The web holder retracting cam, as shown at 13, is made in one piece, which piece is inserted in a suitable gap or recess milled part -way through the inner ring member 2. The said cam is adjustably mounted by screws 14, 14% positioned adjacent opposite ends of said cam 13 and. permitting either end of said cam to be moved without substantial movement of the other, because of the radial slots 11i receiving said screws.-

The advancing cams are indicated at 15, 15 and arerepresented as pivotally attached by screws 16, 16 to the underside of plates 1 7, 17, which are themselves secured to the upper face of the inner ring member 2 by screws 18, 18, so that by loosening up on the screws 16 the said cam 15 may be swung in or out to vary the position of the said cams relatively to thecam ends of the cam member 13. v

. When the invention is employed with spring beard needle machines, presser cams may be employed, as indicated at 19, 19, 19 in Fig. 1 to operate upon desirably individual pressers.

It will be observed, viewing Fig. 1, that the outer ring member is provided upon its l inner face with an arc shaped recess 20, wherein are received the cams of the inner ring member 2, said recess being of sudicient len h to permit the relative movement of sai ring members 1 and 2.

By supporting all of the said cams upon one of the ring members, said cams are rendered more readilyaccessible, and it is obvious that in the reciprocating movements in knitting flat webs or in the production of heel and toe work, it is necessary to reciprocate merely the ring which directly carries the said cams.

` Having thus described one illustrative embodiment of my invention, ll desire it to be understood that although speciiicterms are employed, they are used in a generic and descriptive sense and not for purposes of limitation, the scope of the invention being set forth in the following claims.

1.4 In circular knitting mechanism employing a circular series of sinkers, 'web holders or like instrumentalities, and a bed ring receiving the same,a cap ringfor said instrumentalities adapted to overlie said instru- .mentalities and bed ring and including rela- Bil ' llt) inname tively movable inner and outer curved members together providing a groove tor the reception of the entire series of instrumentalities, advancing and. retracting cams carried wholly by one of said members, means to permit predetermined relative movement between said inner and outer members, and means to permit a predetermined shogging movement of said ring.

2. ln circular knitting mechanism employing a circular series ot siers, web holders or like instrumentalities, and a bed ring receiving the same, a cap ring tor said instrumentahties adapted to overlie said instrumentalities and bed ring and including relatively movable inner and outer curved members together providing a groove tor the reception ot the entire series ot instrumentalities, advancing and rctracting cams carried wholly by one of said members, and means to permit predetermined relative movement between said innerY and ,outer members.

3. lin circular mitting mechanism employing al circular series ot sinkers, web holders or like instrentalities, and a bed ring receiving the same, a cap ring tor said instrumentalities adapted to overlie said instrumentalities and bed ring and including relatively movable inner and outer curved members together providing a groove tor the reception ot the entire series ot instrumentalities, advancing and retracting cams carried wholly by said inner member, means to permit predetermined relative movement between said inner and outer members, and means to permit a predetermined shogging movement ot said ring.

l. lin circular kni ting mechanism emloying a circular series ot sinkers, web holders or like instrnmentalities, and a bed ring receiving the same, a ca ring for said web holders adapted to over ie said instrumentalities and bed ring and including relatively movable inner and outer concentric rings which together provide a oove tor the reception ot the entire series ot instrumentalities, advancing and retraoting cams wholly carried by said inner ring, means to permit predetermined relative ovement between said inner and outer concentric rings, and means to permit a predetermined shogging movement ot said cap ring.

5. ln circular knitting mechanism employing a circular series ot sinkers, web holders or like instrumentalities, and a bed ring receiving the same, a ca Irin for said web holders adapted to over ie said instrumentalities and bed ring and including relatively movable inner and outer curved members together providing a groove for the reception ot the entire series ot instrumentalities, advancin and retracting cams carrled wholly by sai inner member., said cams being adjustably mounted relative to each other, and means to permit relative circular movement between said curved members.

d. lin circular hitting mechanism emloying a circular series of sinkers, web olders or like instrumentalities and a bed ring receiving the same, cams to reciprocate said instrumentalities, a cam carrier adapted to overlie said instrumentalities and bed ring and including inner and outer members arranged for relative or synchronous movement, said members together providing a groove for the reception ot `the entire series ot instrumentalities, said cams being secured wholly to said inner member, and means on said outer member to edect relative movement between said reciprocating elements and said cam carrier.

7. lin knitting mechanism employing sinkers, web holders or like instrumentalities,

and a bed ring receiving the same, a cap ring l for said instrumentalities adapted to overlie said instrumentalities and bed ring and including inner and outer concentric rings l,

2, the outer ring having an arc Sha ed recess 20, a single retractlng cam i3 an two-advancing cams l5 at opposite sides thereot,`

lll@

mentalities, a pair ot advancing cams l5 havin pivots, plates i7 secured to the inner curve member and to which said advancin cams l5 are pivoted with capacity tor adJustment and retracting cam means between said advancing cams.

9. ln circular tting mechanism em loying a circular series ot siers, web ho ders or like instrumentalities, and a bed ring receivin the same, a cap ring for said instrumenta ities adapted to overliesaid instrumentalities and bed ring and including relatively movable inner and outer curved members together providing a groove for the reception et the entire series ot instrumentalities, a pair of advancing cams carried by the inner curved member, and an intermediate re- Miti lll@- litt tracting cam i3, and means at each end or i said retracting cam consistin of radial slots and screw like projections t erein tor permitting adjustment ot said retracting cam.

l0., lin circular knitting echanism employing a circular series oit sinkers, web

holders or like instrentalities, and a bed ring receiving the same, a cap ring tor said instentalities adapted to overl1e said instrumentalities and bed ring and including relatively movable 'inner endl outer ring like members together providing e groove `or the reception of the entire series of instruy mentalities, the vseid outer ring like member" o having en ere shaped recess20, and' the inner ring like member having advancingv endl retracting cams carried thereby and received memos in said are shaped recess, the letter being scientiy grolonged to permit relative movement o the ports of seid cap .wl g

En testimony whereof, I have signy neme to this specification.

GERGE P. BOSWURTH. v l 

